1.9k citations · 3.4k across the 22 of their papers we have counts for
22 papers
First Very Long Baseline Interferometry Fringe Detection at 690GHz
Ming-Tang Chen, Geoffrey B. Crew, Dan Bintley +42
We report the first very long baseline interferometry (VLBI) experiment conducted in the 690 GHz atmospheric window. On 2024 November 21, observations with the Atacama Large Millim…
First Very Long Baseline Interferometry Detections at 870μm
Alexander W. Raymond, Sheperd S. Doeleman, Keiichi Asada +276
The first very long baseline interferometry (VLBI) detections at 870m wavelength (345GHz frequency) are reported, achieving the highest diffraction-limited angular resolutio…
Absolute Flux Density Calibration of the Greenland Telescope Data for Event Horizon Telescope Observations
J. Y. Koay, K. Asada, S. Matsushita +35
Starting from the observing campaign in April 2018, the Greenland Telescope (GLT) has been added as a new station of the Event Horizon Telescope (EHT) array. Visibilities on baseli…
First Sagittarius A* Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole in the Center of the Milky Way
The Event Horizon Telescope Collaboration
We present the first Event Horizon Telescope (EHT) observations of Sagittarius A* (Sgr A), the Galactic center source associated with a supermassive black hole. These observati…
The Greenland Telescope: Construction, Commissioning, and Operations in Pituffik
Ming-Tang Chen, Keiichi Asada, Satoki Matsushita +51
In 2018, the Greenland Telescope (GLT) started scientific observation in Greenland. Since then, we have completed several significant improvements and added new capabilities to the…
A ring-like accretion structure in M87 connecting its black hole and jet
Ru-Sen Lu, Keiichi Asada, Thomas P. Krichbaum +118
The nearby radio galaxy M87 is a prime target for studying black hole accretion and jet formation^{1,2}. Event Horizon Telescope observations of M87 in 2017, at a wavelength of 1.3…
First M87 Event Horizon Telescope Results. II. Array and Instrumentation
The Event Horizon Telescope Collaboration
The Event Horizon Telescope (EHT) is a very long baseline interferometry (VLBI) array that comprises millimeter- and submillimeter-wavelength telescopes separated by distances comp…
Electronics Instrumentation for the Greenland Telescope
Derek Kubo, Chih-Chiang Han, Hiroaki Nishioka +37
The Greenland Telescope project has recently participated in an experiment to image the supermassive black hole shadow at the center of M87 using Very Long Baseline Interferometry…
The Greenland Telescope: Antenna Retrofit Status and Future Plans
Philippe Raffin, Paul T. P. Ho, Keiichi Asada +32
Since the ALMA North America Prototype Antenna was awarded to the Smithsonian Astrophysical Observatory (SAO), SAO and the Academia Sinica Institute of Astronomy & Astrophysics (AS…
AMiBA: Cluster Sunyaev-Zel'dovich Effect Observations with the Expanded 13-Element Array
Kai-Yang Lin, Hiroaki Nishioka, Fu-Cheng Wang +35
The Yuan-Tseh Lee Array for Microwave Background Anisotropy (AMiBA) is a co-planar interferometer array operating at a wavelength of 3mm to measure the Sunyaev-Zeldovich effect (SZ…
The Greenland Telescope (GLT): Antenna status and future plans
Philippe Raffin, Juan Carlos Algaba-Marcos, Keichi Asada +29
The ALMA North America Prototype Antenna was awarded to the Smithsonian Astrophysical Observatory (SAO) in 2011. SAO and the Academia Sinica Institute of Astronomy & Astrophysics (…
ALMA Nutator Design and Preliminary Performance
Pierre Martin-Cocher, John Ford, Patrick M. Koch +7
We report the past two years of collaboration between the different actors on the ALMA nutator. Building on previous developments, the nutator has seen changes in much of the desig…
1.2 Meter Shielded Cassegrain Antenna for Close-Packed Radio Interferometer
Patrick M. Koch, Philippe Raffin, Yau-De Huang +17
Interferometric millimeter observations of the cosmic microwave background and clusters of galaxies with arcmin resolutions require antenna arrays with short spacings. Having all a…
Contamination of the Central Sunyaev--Zel'dovich Decrements in AMiBA Galaxy Cluster Observations
Guo-Chin Liu, Mark Birkinshaw, Jiun-Huei Proty Wu +26
We investigate the contamination of the Sunyaev--Zel'dovich (SZ) effect for six galaxy clusters, A1689, A1995, A2142, A2163, A2261, and A2390, observed by the Y. T. Lee Array for M…
AMiBA: Sunyaev-Zel'dovich effect derived properties and scaling relations of massive galaxy clusters
Yu-Wei Liao, Jiun-Huei Proty Wu, Paul T. P. Ho +27
The Sunyaev-Zel'dovich Effect (SZE) has been observed toward six massive galaxy clusters, at redshifts 0.091 \leq z \leq 0.322 in the 86-102 GHz band with the Y. T. Lee Array for M…
AMiBA: scaling relations between the integrated Compton-y and X-ray derived temperature, mass, and luminosity
Chih-Wei Locutus Huang, Jiun-Huei Proty Wu, Paul T. P. Ho +27
We investigate the scaling relations between the X-ray and the thermal Sunyaev-Zel'dovich Effect (SZE) properties of clusters of galaxies, using data taken during 2007 by the Y.T.…
Platform Deformation Refined Pointing and Phase Correction for the AMiBA Hexapod Telescope
Patrick M. Koch, Michael Kesteven, Yu-Yen Chang +26
The Array for Microwave Background Anisotropy (AMiBA) is a radio interferometer for research in cosmology, currently operating 7 0.6m diameter antennas co-mounted on a 6m diameter…
AMiBA: Broadband Heterodyne CMB Interferometry
Ming-Tang Chen, Chao-Te Li, Yuh-Jing Hwang +28
The Y. T. Lee Array for Microwave Background (AMiBA) has reported the first science results on the detection of galaxy clusters via the Sunyaev Zel'dovich effect. The science objec…
AMiBA: System Performance
Kai-Yang Lin, Chao-Te Li, Paul T. P. Ho +29
The Y.T. Lee Array for Microwave Background Anisotropy (AMiBA) started scientific operation in early 2007. This work describes the optimization of the system performance for the me…
The AMiBA Hexapod Telescope Mount
Patrick M. Koch, Michael Kesteven, Hiroaki Nishioka +35
AMiBA is the largest hexapod astronomical telescope in current operation. We present a description of this novel hexapod mount with its main mechanical components -- the support co…
Tests of AMiBA Data Integrity
Hiroaki Nishioka, Fu-Cheng Wang, Jiun-Huei Proty Wu +26
We describe methods used to validate data from the Y.T. Lee Array for Microwave Background Anisotropy (AMiBA), an interferometric array designed to measure the Sunyaev-Zel'dovich e…
Mass and Hot Baryons in Massive Galaxy Clusters from Subaru Weak Lensing and AMiBA SZE Observations
Keiichi Umetsu, Mark Birkinshaw, Guo-Chin Liu +30
We present a multiwavelength analysis of a sample of four hot (T_X>8keV) X-ray galaxy clusters (A1689, A2261, A2142, and A2390) using joint AMiBA Sunyaev-Zel'dovich effect (SZE) an…